Position detecting apparatus and method for detecting position p

Details Position detecting apparatus and method for detecting position p Position detecting apparatus and method for detecting position p

1997-04-30

1999-12-21

Saras, Steven J.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

345179, 178 1807, 178 1806, G09G 500

Patent

active

060055553

ABSTRACT:
A position detecting apparatus capable of detecting position pointing devices of any combination simultaneously out of plural position pointing devices, thereby providing a user a friendly apparatus. A frequency of a resonance circuit provided inside a position pointing device is set by a command signal transmitted from a tablet, causing plural position pointing devices placed on the tablet to have a different frequencies, thereby suppressing electromagnetic interference among position pointing devices on the tablet, so that a simultaneous detection becomes available.

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patent: 5693914 (1997-12-01), Ogawa
patent: 5734377 (1998-03-01), Fukuzaki

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